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Coding device, decoding device, coding/decoding system, coding method, and decoding method

a coding device and pixel data technology, applied in the field of coding devices and pixel data coding, can solve the problems of increasing storage capacity or transfer capability, and difficulty in fabricating frame memory that meets the needs, and achieve the effect of suppressing the degradation of image data

Active Publication Date: 2016-05-03
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively controls the maximum code length to guarantee the target compression ratio, reducing image data degradation and optimizing storage capacity utilization.

Problems solved by technology

Therefore, a storage capacity or a transfer capability necessary for the frame memory also increases continuously, and fabrication of the frame memory that meets the needs becomes harder.

Method used

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  • Coding device, decoding device, coding/decoding system, coding method, and decoding method
  • Coding device, decoding device, coding/decoding system, coding method, and decoding method
  • Coding device, decoding device, coding/decoding system, coding method, and decoding method

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Embodiment Construction

[0065](Coding / Decoding System)

[0066]First a coding / decoding system according to an embodiment of the present invention will be described with reference to the drawing. FIG. 1 is a block diagram illustrating a configuration example of an image processing system to which the coding / decoding system of the embodiment is applied.

[0067]As illustrated in FIG. 1, an image processing system PS includes an input terminal IN to which image data is input, an image processing device P that processes the image data input from the input terminal IN and outputs the processed image data, an output terminal OUT that externally outputs the processed image data output from the image processing device P, and a coding / decoding system CD in which data necessary for the image processing device P to perform image processing is stored.

[0068]The image processing device P performs processing, such as overshoot processing (also called OS processing or overdrive processing, processing of adjusting a gray level o...

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Abstract

A coding device and method, a decoding device and method, and a coding / decoding system including the coding device and the decoding device are provided. The coding device includes a predictive value data generator, a predictive error data generator, a variable-length coded data generator that codes the predictive error data to sequentially generate variable-length coded data, in which a code length is variable and equal to or shorter than a set maximum length, and a coding controller. The coding controller sequentially calculates an accumulated value by accumulating a difference between the code length of the variable-length coded data and a target code length, and sequentially sets the maximum code length based on the accumulated value and the number coding time performed by the coder such that the accumulated value is zero or lower.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Phase filing under 35 U.S.C. §371 of International Application No. PCT / JP2012 / 003776 filed on Jun. 11, 2012, and which claims priority to Japanese Patent Application No. 2011-137967 filed on Jun. 22, 2011.TECHNICAL FIELD[0002]The present invention relates to a coding device and a coding method for coding pixel data, specifically to a coding device and a coding method for coding data stored in a frame memory and the like. The present invention relates to a decoding device and a decoding method for decoding the data coded by the coding device and the coding method. Further, the present invention relates to a coding / decoding system including the coding device and the decoding device.BACKGROUND ART[0003]In some image processing devices applied to television sets and the like, image data (including data in which a predetermined calculation, such as addition and subtraction, is performed to the image data, the sam...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N19/00H04N19/169H04N19/152H04N19/137H04N19/124H04N19/13H04N19/90H04N19/91H04N19/147H03M7/40H04N19/126H04N19/134H04N19/136H04N19/154H04N19/182H04N19/186H04N19/189H04N19/196H04N19/50
CPCH04N19/147H04N19/13H04N19/124H04N19/137H04N19/152H04N19/90H04N19/1887
Inventor YAMAGUCHI, MASAYUKIYAMADA, AKIHISANAKAMAE, TAKASHI
Owner SHARP KK
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